This series is winter accessible and should be rather easy, The only difficult part is that they are spread out. You might want to take note of something at each of the cache locations so that you can find the final.
Santa's Reindeer Fact - Donner - A Thunderous Presence Donner’s name comes from “thunder” in German. This is for good reason. He’s always noticed when entering a room because he’s got a deep booming baritone voice. He loves to sing those low notes. His joyous renditions of “Santa Baby” makes all the reindeerettes swoon. “Santa Claus is Coming to Town”, and “Here Comes Santa Claus” always receive high marks and rowdy applause from his fellow reindeer. He loves hanging out with Blitzen, too. Together, they can really belt out some dynamic duos.